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The Greek philosopher Aristotle was the first person to record a element. (this was in BC)
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Democritus another greek philosopher discovered the atom when he asken "If you break a piece of matter in half, and then break it in half again, how many breaks will you have to make before you can break it no further?" this lead him to think about the smallest possiable bit of matter which he called ATOMS! (this was in BC)
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Isaac Newton peposed that our universe was made up of manny smaller masses that were in motion or vibrating.
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John Dalton discovered that elements were made up of all the same atoms. He also discovered why some atoms reacted to gases and water and why others didn't.
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Dmitri Mendeleev a russian chemist invented this table of elements. This graphing has hepled many other experimants as reactivity of the elements are more clear and enlemts are more orgnised.
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The gold foil experiment was preformed by Hans Geiger and Ernest Marsdenand directed by Ernest Rutherford. The gold foil experiment resulted in the finding of the nuclues of an atom and helped understand the structure of the atom
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Ernest Rutherford split the atom in 1917 in a Wellington. Sir Rutherford's photo is now placed on our $100 dollar note as a way to say congradulations for this achievement and is one of New Zealands most famous scientists.
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Paul Dirac made the realisation that both positve and negative parts were inside an atom. Paul also relised the existence of a positive particle having the same mass and charge as the known (negative) electron.
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The first experiment to split the nucleus was performed by students from Cambridge University or more commonly known as University of Otago thes students were working Sir Rutherford's direction in Wellington.
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Enrico Fermi was an Italian theoretical and experimental physicist. Eneico conducted an experiment which allowed energy to be realeased from the nucleus within an atom. Unfortuantly made a chain reaction which relsulted in the invention of the atomic bomb. Today Enrico Fermi is also refured to as the 'godfather of ther atomic bomb.'
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In 2009 an song was published about splitting the atom by Massive Attack. :)